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EP1047286A1 - Starter pour lampe à décharge dans un véhicule - Google Patents

Starter pour lampe à décharge dans un véhicule Download PDF

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Publication number
EP1047286A1
EP1047286A1 EP00107458A EP00107458A EP1047286A1 EP 1047286 A1 EP1047286 A1 EP 1047286A1 EP 00107458 A EP00107458 A EP 00107458A EP 00107458 A EP00107458 A EP 00107458A EP 1047286 A1 EP1047286 A1 EP 1047286A1
Authority
EP
European Patent Office
Prior art keywords
voltage
temperature
diode
ballast
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00107458A
Other languages
German (de)
English (en)
Other versions
EP1047286B1 (fr
Inventor
Volker Radtke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Publication of EP1047286A1 publication Critical patent/EP1047286A1/fr
Application granted granted Critical
Publication of EP1047286B1 publication Critical patent/EP1047286B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/2885—Static converters especially adapted therefor; Control thereof
    • H05B41/2886—Static converters especially adapted therefor; Control thereof comprising a controllable preconditioner, e.g. a booster
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2921—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2926—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against internal abnormal circuit conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the invention relates to a ballast for a high-pressure gas discharge lamp in a motor vehicle, with a DC converter, the one DC converter downstream H-bridge circuit and one Ignition circuit, and a controller, the output of which DC voltage converter controls, a device for power detection, which supplies the controller with an actual value for the lamp power, and a device for Reference voltage generation, which gives the controller a setpoint for the Lamp power supplies.
  • ballast is known from DE 43 31 952 A1.
  • the known Ballast has a control device, which during the Start phase of the high pressure gas discharge lamp an increased output of the DC converter allows, and the lamp power during stationary Burning phase of the high pressure gas discharge lamp to a lower value limited.
  • the problem underlying the invention relates to the prevention of thermal overload of the ballast due to external heating and self-heating in operation.
  • the critical temperature results in essentially from the ambient temperature and the self-heating of the Ballast.
  • the self-heating is in turn essential by the in Ballast generated power loss determined.
  • the Power reduction should only start from a predefinable temperature threshold (Operating temperature value).
  • the invention is therefore based on the object of being as simple and simple as possible Inexpensive ballast for a high pressure gas discharge lamp in one To create a motor vehicle, the lamp power from a predetermined Operating temperature value from the nominal output continuously to a lower one Reduce performance at a higher temperature.
  • This object is achieved in that a Circuit arrangement above the setpoint determining the lamp power of a predeterminable operating temperature value is reduced depending on the temperature.
  • a circuit arrangement is proposed to reduce the power there are two voltage dividers, which are coupled to a double diode, wherein one of the voltage dividers contains a temperature-dependent resistor.
  • ballast with a circuit arrangement designed in this way, by the dimensioning of the voltage divider arrangement of both Use temperature value, as well as the size of the temperature-dependent Power reduction (derating dP / dT) can be easily determined.
  • the circuit arrangement is also characterized in that below the Temperature, the lamp power is independent of temperature and the Circuit arrangement the operating temperature and derating with high Adheres to accuracy.
  • the circuit has a DC-DC converter (W), the Output voltage via an H-bridge circuit (H) alternating one High pressure gas discharge lamp (GDL) is supplied.
  • W DC-DC converter
  • H High pressure gas discharge lamp
  • Z switched superimposed ignition circuit
  • the output power of the DC converter (W) is determined by the Output variable (control) controlled by a controller (R).
  • a Power detection device (LE) detects lamp current (I) and lamp voltage (U) and specifies an actual voltage value (Vactual) corresponding to the lamp power the controller (R).
  • the corresponding setpoint specification comes from a facility for reference voltage generation (RF), which has a reference voltage value (Vref) generated.
  • This reference voltage value (Vref) is determined by the Circuit arrangement for temperature-dependent power reduction (T) modified depending on temperature. The functioning of this circuit arrangement (T) is explained in more detail with reference to FIG. 1.
  • the circuit arrangement shown in Figure 1 consists of two, by means of one first diode (D1A) coupled voltage dividers.
  • the first voltage divider consisting of resistors R1 and R2 is the standard one Target voltage divider. This generates the from a reference voltage (Vref) Setpoint voltage value (Vsoll), which represents the setpoint for the power control, where voltage and power output are inversely proportional to each other.
  • Vref reference voltage
  • Vsoll Setpoint voltage value
  • the second voltage divider which has a temperature-dependent voltage value (Vtemp) is generated by a temperature-dependent resistor (NTC), here designed as a thermistor, the resistors R3 and R4, and one second diode (D1B).
  • the series connection becomes Resistor R3 and the thermistor (NTC) always low resistance, so that the temperature-dependent voltage value (Vtemp) increases. If the temperature-dependent voltage value (Vtemp) becomes greater than the sum of the Target voltage value (Vsoll) and the forward voltage of the first diode (D1A), the previously constant target voltage value (Vset) raised.
  • the target voltage value (Vset) With increasing temperature, the target voltage value (Vset) increases and thus falls the power delivered.
  • the error caused by the forward voltages of the diodes (D1A, D1B) is very low, as these only have an influence at very high temperatures (high temperature ⁇ low flow voltage) and additionally through the use of two thermally connected diodes (D1A, D1B) for the most part is compensated. This is the case if the two diodes (D1A, D1B) flowing currents are of the same order of magnitude.
  • both diodes can be used with a commercially available double diode be carried out, because in this way firstly both diodes (D1A, D1B) are special good thermal coupling and secondly, particularly good matching Have characteristic curves. If the resistance divider is designed to be very high-resistance the use of a low leakage diode safely prevents that below the Operating temperature an unwanted influence of the target voltage value (Vsoll) by a leakage current.
  • Vsoll target voltage value
  • FIG. 2 shows the typical course of the target voltage (lower diagram) and the resulting lamp power (upper diagram) depending on the temperature.
  • both the target voltage value and the Lamp power value constant over wide temperature ranges (approx.3.5 V or 34 W). It only increases from the operating temperature value (T1), which here is approx. 105 ° C Target voltage value is approximately linear, which means that the lamp power is reversely linear falls off. At a temperature of around 145 ° C the lamp power is at 28 W. sunk. This will cause thermal overload and destruction of the Ballast effectively prevented even at very high temperatures.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP00107458A 1999-04-22 2000-04-06 Starter pour lampe à décharge dans un véhicule Expired - Lifetime EP1047286B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19918261A DE19918261A1 (de) 1999-04-22 1999-04-22 Vorschaltgerät für eine Hochdruckgasentladungslampe in einem Kraftfahrzeug
DE19918261 1999-04-22

Publications (2)

Publication Number Publication Date
EP1047286A1 true EP1047286A1 (fr) 2000-10-25
EP1047286B1 EP1047286B1 (fr) 2003-11-05

Family

ID=7905481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107458A Expired - Lifetime EP1047286B1 (fr) 1999-04-22 2000-04-06 Starter pour lampe à décharge dans un véhicule

Country Status (3)

Country Link
EP (1) EP1047286B1 (fr)
DE (2) DE19918261A1 (fr)
ES (1) ES2209709T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1748684A3 (fr) * 1999-06-21 2007-08-01 Denso Corporation Appareil pour alimenter des lampes à décharge à haute tension dans des véhicules
WO2008011238A2 (fr) * 2006-07-18 2008-01-24 Lutron Electronics Co., Inc. Protection thermique pour des ballasts de lampe
US7436131B2 (en) 2003-11-12 2008-10-14 Lutron Electronics Co., Inc. Thermal protection for lamp ballasts

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4661435B2 (ja) * 2005-08-02 2011-03-30 株式会社デンソー 車両用放電灯の制御方法
DE102006011353A1 (de) * 2006-03-11 2007-10-04 Hella Kgaa Hueck & Co. Schaltungsanordnung zur Regelung der Ausgangsleistung eines Vorschaltgeräts für eine Hochdruckgasentladungslampe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240009A (en) * 1978-02-27 1980-12-16 Paul Jon D Electronic ballast
EP0644709A1 (fr) * 1993-09-21 1995-03-22 Hella KG Hueck & Co. Dispositif pour démarrer et alimenter une lampe à décharge sur une automobile

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536142A1 (de) * 1995-09-20 1997-03-27 Bosch Gmbh Robert Thermisch geschütztes, elektrische Bauelemente enthaltendes Steuergerät
DE19702687C1 (de) * 1997-01-25 1998-08-06 Bosch Gmbh Robert Anordnung zum Schutz gegen Übertemperatur eines Steuergeräts für Gasentladungslampen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240009A (en) * 1978-02-27 1980-12-16 Paul Jon D Electronic ballast
EP0644709A1 (fr) * 1993-09-21 1995-03-22 Hella KG Hueck & Co. Dispositif pour démarrer et alimenter une lampe à décharge sur une automobile
DE4331952A1 (de) * 1993-09-21 1995-03-23 Hella Kg Hueck & Co Einrichtung zum Starten und Betreiben einer Gasentladungslampe in Kraftfahrzeugen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1748684A3 (fr) * 1999-06-21 2007-08-01 Denso Corporation Appareil pour alimenter des lampes à décharge à haute tension dans des véhicules
US7436131B2 (en) 2003-11-12 2008-10-14 Lutron Electronics Co., Inc. Thermal protection for lamp ballasts
US7675250B2 (en) 2003-11-12 2010-03-09 Lutron Electronics Co., Inc. Thermal protection for lamp ballasts
US7911156B2 (en) 2003-11-12 2011-03-22 Lutron Electronics Co., Inc. Thermal foldback for a lamp control device
WO2008011238A2 (fr) * 2006-07-18 2008-01-24 Lutron Electronics Co., Inc. Protection thermique pour des ballasts de lampe
WO2008011238A3 (fr) * 2006-07-18 2008-03-20 Lutron Electronics Co Protection thermique pour des ballasts de lampe

Also Published As

Publication number Publication date
DE19918261A1 (de) 2000-10-26
ES2209709T3 (es) 2004-07-01
DE50004294D1 (de) 2003-12-11
EP1047286B1 (fr) 2003-11-05

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